222乘以88加888乘以78 怎样用简便运算
问题描述:
222乘以88加888乘以78 怎样用简便运算
答
78乘78乘32
答
=222*88+222*4*78
=222*88+222*312
=222*(88+312)
=222*400
=88800
答
222*88+888*78
=222*4*22+888*78
=888*22+888*78
=888*(22+78)
=888*100
=88800